Multiple studies indicate that solar and light sails hold strong theoretical and technical feasibility for enabling interstellar missions and traveling light-years beyond the solar system.
The retrieved literature contains several papers directly addressing the use of solar and light sails for interstellar missions. Papers [0], [6], [7], and [11] discuss the theoretical feasibility, material designs (such as ultralight aerographite), and roadmaps for employing solar radiation pressure or directed energy propulsion to send probes light-years away into interstellar space. While paper [9] cautions about the immense timescales required for certain passive natural objects or heavier conceptual sails, the weight of evidence in papers explicitly focused on engineered light sails supports their feasibility for interstellar propulsion.